Global Patent Index - EP 0844623 A1

EP 0844623 A1 19980527 - Pressed body of amorphous magnetically soft alloy powder and process for producing same

Title (en)

Pressed body of amorphous magnetically soft alloy powder and process for producing same

Title (de)

Gepresster Formkörper aus amorphes Weichmagnetpuder und Herstellungsverfahren

Title (fr)

Corps en poudre amorphe magnétiquement doux comprimé et procédé de fabrication

Publication

EP 0844623 A1 19980527 (EN)

Application

EP 97120630 A 19971125

Priority

  • JP 33154696 A 19961126
  • JP 27219297 A 19970917

Abstract (en)

A powder of composite particles is prepared by adhering to the surfaces of particles of an amorphous magnetically soft alloy particles of a glass having a softening point lower than the crystallization temperature of the alloy to coat the surfaces of the alloy particles with the glass. The powder of composite particles prepared is pressed at a temperature higher than the softening point of the glass and lower than the crystallization temperature of the alloy to bond the alloy particles with the glass. The pressed powder body is at least 0.5 in the ratio of the magnetic permeability at 10<7>Hz to the magnetic permeability at 10<4>Hz.

IPC 1-7

H01F 1/153

IPC 8 full level

B22F 1/00 (2006.01); B22F 1/02 (2006.01); B22F 3/02 (2006.01); H01F 1/153 (2006.01); H01F 1/22 (2006.01)

CPC (source: EP US)

H01F 1/15366 (2013.01 - EP US)

Citation (search report)

  • [X] EP 0302355 A1 19890208 - HITACHI METALS LTD [JP]
  • [X] DATABASE WPI Section Ch Week 8746, Derwent World Patents Index; Class L03, AN 87-325021, XP002054966
  • [X] DATABASE WPI Section Ch Week 8824, Derwent World Patents Index; Class L03, AN 88-165373, XP002054967
  • [X] DATABASE WPI Section Ch Week 9217, Derwent World Patents Index; Class L03, AN 92-137434, XP002054968

Designated contracting state (EPC)

BE DE FR GB IT SE

DOCDB simple family (publication)

EP 0844623 A1 19980527; EP 0844623 B1 20010919; AU 4542497 A 19980528; AU 724707 B2 20000928; CA 2221979 A1 19980526; DE 69706806 D1 20011025; DE 69706806 T2 20020425; JP H10212503 A 19980811; KR 100344268 B1 20021205; KR 19980042792 A 19980817; US 6017490 A 20000125

DOCDB simple family (application)

EP 97120630 A 19971125; AU 4542497 A 19971126; CA 2221979 A 19971124; DE 69706806 T 19971125; JP 27219297 A 19970917; KR 19970063180 A 19971126; US 97455397 A 19971119